Every day millions of people enter virtual worlds through video games, which are now the fastest-growing form of entertainment and are played by young and old alike. This account unlocks this amazing world, providing insight into what makes video games so fascinating and exploring the emotions involved in playing, the issues that surround them, and the future of the technology. Considering how games are appearing on phones and other mobile electronic devices, the book raises the questions Will everyone become a gamer? and Will people gain happiness or merely lose time?